Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 144 for “"least-cost"”.
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In the balance: Electricity, sustainability and least cost competition
… sustainability by reconciling the principles of least cost planning with the competitive electricity industry. The thesis proposes a novel balanced approach of ‘least cost competition’. Least cost competition aims to encourage both more effective competition in delivering energy services, and …
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Least Cost Path Modeling Between Inka and Amazon Civilizations
Least Cost Path Analysis (LCPA) is a GIS-based approach for calculating the most efficient route between a start and end point, often in terms of shortest time or least amount of energy. The approach is often applied in archaeology to estimate locations of sites, and routes between them. We applied …
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Integrating the Least-Cost Grade-Mix Solver into ROMI
… expenses stem from raw material (lumber) cost. Rough mill costs can be reduced by optimizing the lumber grade or grades that are purchased. This solution is known as the least-cost lumber grade-mix solution. The least-cost lumber grade-mix solutions has been a topic of great interest to …
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Least-cost ground holding strategies with departure and arrival delay uncertainties
… idea is that it is cheaper (i.e. lower operating costs for the airline) and safer to wait on the ground at the origin airport than wait in the air at the destination airport when both departure and arrival airports have uncertain capacities. In the future free flow management environment flights …
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Sea sparing, sea sharing, and production at least cost to the planet
Fisheries are the most direct threat to marine biodiversity. However, fisheries are also vital for food security, with over 3.2 billion people relying on fish for a significant part of their diet. With growing international support for protecting 30% of the planet by 2030, no-take marine protected …
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Visualising continuous intra-landscape isolation for brushtail possums using least-cost modelling
… quantify and visualise isolation. Methods using least-cost modelling to measure connectivity are presented that fill this knowledge gap. To begin, I demonstrate that the accumulated-cost of a least-cost path is the only reliable method to measure connectivity using least-cost modelling. Then, a …
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Development of a least cost energy supply model for the SADC region
… model is an optimisation tool designed to find least cost energy supply strategies. It has an individual representation of each country in the region, but allows them to trade in energy. This makes it possible to evaluate coordinated strategies and pooling of resources, and thus to identify …
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Accumulated Surfaces & Least-Cost Paths: GIS Modeling for Autonomous Ground Vehicle (AGV) Navigation
… an accumulated surfaces can be built on which a least-cost path can be located. The sensitivity analysis allows generation of many routes which can be field tested for the appropriate weight selection for each factor. Ultimately, the entire process would select an optimal path and output closely …
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An approach to considering uncertainty in developing long-term, least-cost wood procurement policies
… establish trade-off relationships between the cost of one policy and the uncertainty of another policy. The questions of the extent of model building and the implications for future study in this area are also considered.
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The Use of Integrated Design to Deliver the Energy Efficiency in Buildings at Least Cost
… practicability, attitudes, and saving cost. Energy efficiency in buildings may require specific solutions and evaluation. The aim of this study is to investigate the impacts of using the integrated design to deliver energy efficiency in buildings at least cost. Also, this research seeks …
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Identification of barriers and least cost paths for autonomous vehicle navigation using airborne LIDAR data
… a significant role in identifying barriers and least cost paths for such vehicles. Least cost paths minimize the sum of impedance across a surface. Impedance can be measured by steepness of slope, impenetrable barriers such as vegetation and buildings, fence lines and streams, or other factors …
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A Collaborative Web Application Framework for Least Cost Caloric Paths with Constraints on High Resolution Data
… direction; rather, they follow the path of least resistance. The path of least resistance could mean avoiding mountain ranges, or following a stretch of terrain or avoiding large bodies of water. These paths are taken because they are easier to traverse and allow the traveler to expend the …
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An empirical investigation of the reliability and validity of the U.S.D.A. model to determine least-cost hospital food service systems
… reliability and validity. The Model lists the costs and needs of each type of food service system for different hospital bed sizes and demonstrates how two systems can be compared. The Model concludes that the ready foods system is the least-costly food service system. The U.S.D.A. Model was …
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An environmental impact assessment of the alternative access routes, the Western Access Route, and the Least Cost Alternative Route, to the proposed Mohale Dam, Lesotho
… roads, the Western Access Route (WAR) and the Least Cost Alternative Route (LCAR), to the proposed Mohale Dam site, Lesotho. The procedure adopted by the Environmental Evaluation Unit (EEU) study team for the assessment of environmental impacts associated with the development of the two routes, …
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An environmental impact assessment for the access road to the Mohale dam, Lesotho : a comparative analysis of the Western access road and the least cost alternative route
… access roads to the Mohale Dam, Lesotho: the Least Cost Alternative Route (LCAR) and the Western Access Route (WAR), and to recommend a preferred alternative for construction. The analysis and comparison is couched in a theoretical framework with regard to the process, nature and function of …
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A comparative evaluation of two alternative access routes, the Least Cost Alternative Route (LCAR) and the Western Access Route (WAR), for the Mohale Dam construction, phase 1B, the Lesotho Highlands Water Project
… the Resident Engineers Camp, and * an EIA of the Least Cost Alternative Route (LCAR) and the Western Access Route (WAR) for the transport of construction materials to the Mohale Dam site. The WAR, which forms part of the existing Mountain Road, was identified as a viable option for the transport …
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Modern Portfolio Theory Applied to Electricity Resource Planning
… those strategies have been developed by applying least-cost methodology, in which the cheapest stand-alone resources are simply added, instead of analyzing complete portfolios. As a consequence, least-cost methodology is biased in favor of fossil fuel-based technologies, completely ignoring the …
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A methodology to evaluate uncertainties in planning small-scale power systems
… factors such as short-term demand, system costs, expected revenues, and local development priorities. Often, the decision to go ahead with the investment in such systems is based on the outcomes of single-attribute spreadsheet type analyses and linear optimization runs where key parameters …
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A repairable item inventory system using dynamic programming and Markov processes
… in support of a finite number of customers. A least-cost repair policy and stock level was determined by use of a computer program which is included as an appendix.
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GIS based optimal design of sewer networks and pump stations
… Dijkstra's shortest path algorithm to select the least cost path from a set of potential paths. This method seeks to minimize the total dynamic head. A modified length is used to represent the length of each link or force main segment. The modified length is the physical length of the link …
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